Manually-operated rotary device



AF. DREWS. MANUALLYIOPERATED ROTARY DEVICE APPLICATION FILED NOV. 28, 1919.

Patented May 11, 1920.

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F. DREWS. MANUALLY OPERATED ROTARY DEVICE.

APPLICATION FLLED NOV. 28, 1919.

. Patented May 11, 1920.

2 vSHEETS-SHEET 2- UNITED sTATEs PATENT oEEroE.

FRANK W. DREWS, OF WILLMAR, MINNESOTA.

MANUALLY-OPERATED ROTARY DEVICE.

Application led November 28, 1919.

To all whom t may concern Be it known that I, FRANK IY. Dmcws, a citizen of the United States, residing at VVillmar, in the county of Kandiyohi and State of Minnesota, have invented new and useful Improvements in Manually-Operated Rotary Devices, of which the following 1s a specification. l

The object of my present sole invention is the provision of a manually-operable rotary device susceptible of being held and operated in such manner as to avert wabbling of the driven spindle, and this notwithstanding the spindle may be operated at a high rate of speed.

To the attainment of the foregoing, the invention consists in the improvement as hereinafter described and definitely claimed.

In the accompanying drawings, hereby made a part hereof:

Figure 1 is a perspective of a rotary device constructed in accordance with my invention.

Fig. 2 is a cross-section showing the drive gearing of the device.

Fig. 3 is a sectional perspective illustrative of a portion of the main frame of the device.

Fig. 4 is a diametrical section through the device.

Fig. 5 is a perspective illustrative of an embodiment of the invention that constitutes a simplification of the embodiment shown in Figs. 1 to 4.

Similar numerals designate corresponding parts in Figs. 1 to 4, to which reference will first be had.

A mong other elements the device comprises a main frame. The said frame is made up of a central sleeve 1, a web 2, a circular wall 3 on the web, and braces 4 interposed between the sleeve 1 and the circular wall 3. It will also be observed that the web 2 is provided with a central sleeve bearing 5, and that a shank 6 extends radially from the circular wall 3 so as to carry a convenient radially disposed handle 7. In the web 2 and adjacent to the inner side of the wall 3 is formed a circular groove 8.

Arranged within the circular wall 3 of the main frame is an interiorly toothed annular gear 9, and in the inner side of said gear 9 is formed a groove 10 which, in conjunction with the groove 8, forms a race for Specification of Letters Patent.

Patented May 11, 1920.

Serial No. 341,142.

anti-friction balls 11. The said gear 9 is carried by an outwardly projecting spider 12, and at the central portion of said spider is arranged a socket 13 to receive and to transmit rotary motion to a spindle 14 on which is keyed a spur gear 15, said ispur gear being intermeshed with the spur gear 16, and the spur gear 16, in turn, being intermeshed with a spur gear 17 that is also intermeshed with the teeth of the annular gear 9. The spur gears 16 and 17 are mounted on sub-shafts 18 that extend from the web 2, as illustrated. At 19 the spindle 14 is provided with a c ollar, and between said collar and the sleeve 1 is interposed a washer 20. I would also have it understood that I prefer to interpose the anti-friction balls 21 between the washer 20 and the collar 19. Shown as carried upon the spindle 14 is a drill chuck 22. I would have it understood, however, in this connection that the spindle 14 may be used to carry any desired implement or device that it is sought to rotate at a highrate of speed.

Fixed with respect to the annular gear 9 is one end of an operating crank 30; the said crank 30 having a loose hand grasp 31 mounted upon it at an intermediate point of its length and having its opposite end alined with the spindle 14 and journaled at 32 in a rest 33 that may be and preferably is placed against the shoulder of the operator.

In the practical operation of the device as described, the drill or other implement in the chuck 22 is opposed to the surface to be drilled, and the handle 7 is held in one hand of the operator while the operator bears with his shoulder against the rest 33. Then when the operator turns the gear 9 through the medium of the hand-grasp 31 and the crank 30, it will be manifest that the spindle 14 will be powerfully turned at a high rate of speed.

The modified construction shown in Fig. 5 is a material simplification of that shown in Figs. 1 to 4. In the modified construction, the annular interiorly toothed gear 9a is provided with a crank 30a equip ed similarly to that before described. aid gear 9EL is also arranged in a frame and within the circular wall 3a on which is a radial handle 6a. The frame also comprises braces 4a which are interposed between the major portion of the same and a sleeve 1 in Which latter is j'ournal'eda Spindle lll, equipped With a chuck 22a. At its inner end the spindle 14a is provided With a gear 17a that is intermeshed with the gear 9a. From this it follows that While the embodiment shown in Fig. 5 is a material simpliiieation of that illustrated in Figs. l to 4c, it is possessed of practically all of the advantages ascribed to the embodiment of Figs. l to 4.

Having described my invention, What I claim and desire to secure by Letters-Patent, is:

A manually operable rotary device "comprising a fra-me having an annular portion FRANK lV. DREVS. 

